Báo cáo khoa học: The role of the Fe-S cluster in the sensory domain of nitrogenase transcriptional activator VnfA from Azotobacter vinelandii potx

... ligands of the Fe-S cluster. Consequently, the binding of the ATP analog and the subsequent rearrangement of the inter- domain interaction affects the electronic condition of the Fe-S cluster ... with the reconstitution of Fe-S clusters in aerobically purified apo -VnfA support the presence of [Fe 3 S 4 ] + in VnfA. To obtain further evidence demo...

Ngày tải lên: 15/03/2014, 09:20

... production of inter- leukins and secretion of immunoglobulins on the mucosal surface of the intestine [49,50]. The antibacte- rial defence of the intestinal mucosa depends in part on stimulation of CCK ... euge- nin, indicating that eugenin is indeed acting through CCK 2 receptors. To further investigate the interaction of eugenin with CCK 2 receptors, we investigated...

Ngày tải lên: 19/02/2014, 16:20

... grammar, in which the subtrees are specified in advance, in an adaptor grammar the subtrees, as well as their probabilities, are learnt from the train- ing data. In order to make parsing and inference tractable ... parse of that string with a PCFG approximation to the adaptor grammar. This PCFG contains a production for each adapted subtree in the parses of the othe...

Ngày tải lên: 20/02/2014, 09:20

... that the RPEL domain of MRTF-A binds actin more strongly than the RPEL domain of myocar- din, and that the RPEL motif itself is an actin-binding element. RPEL1 and RPEL2 of myocardin bind actin weakly ... as STARS-interacting proteins. These novel proteins con- tain four LIM domains and a C-terminal villin head- piece domain, which mediates actin-binding in several proteins...

Ngày tải lên: 07/03/2014, 01:20

... written in the form of appropriate tables of rules. The paper raises the question of the increasing complexity of the tables when more than the most elementary natural-language con- ditions are included, ... machine translation. It must be noted at the outset that in this author’s opinion the aim of the automatic-parsing component of a machine-translation...

Ngày tải lên: 07/03/2014, 18:20

... confirm the expression of prosemin mRNA in some cell lines. A band of the predicted size (500 bp) of the PCR product was observed for most of the cell lines tested, including HPC-YO and HPC-YS, in ... mole- cular mass from 33 000 to 31 000, indicating successful digestion of the artificial trypsinogen pro-enzyme frag- ment. The amount of 31 kDa prosemin increased...

Ngày tải lên: 16/03/2014, 23:20

... dexamethasone is an inducer of C/EBPa, exerting a positive effect on the steady-state levels of both the mRNA and protein levels in the liver. The increase in the levels of both hepatic C/ EBPa isoforms clearly ... C/EBP responsiveness to the thymidine kinase promoter of the pT81Luc recombinant. We performed the cotransfection of CHO cells with pMSV/EBPa and sing...

Ngày tải lên: 17/03/2014, 09:20

... critical role in the proliferation of MH7A cells. In order to determine whether MLN51 is involved in the anti-apoptosis as well as cell proliferation of MH7A in response to GM-CSF, we examined the apoptosis ... followed by the blocking of FLS apoptosis. FLIP upregulated by MLN51 plays a crucial role in the anti-apoptosis of MH7A cells We examined whether FLIP w...

Ngày tải lên: 23/03/2014, 07:20

... dopamine- selective transporter is found. Keywords: insect; neurotransmitter; transporter; dopamine; octopamine; cocaine. The catecholamine dopamine (DA), the phenolamine octopamine (OA) and the indolamine ... does the moth OAT substitute for DAT in dopami- nergic signaling pathways in the moth CNS, and what is the nature of the mechanism that substitutes for OAT in the...

Ngày tải lên: 23/03/2014, 20:22

... (muscle). The application of the ANOVA technique allowed us to segregate the main (intrinsic) activities of the respective elements from the effects of their interactions. Using this approach, the upstream ... sequences present in the respective constructs are shown in the left portion of the figure as solid black lines. The upper line shows the linkage of...

Ngày tải lên: 23/03/2014, 20:22